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Life Processes Test - 37

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Life Processes Test - 37
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  • Question 1
    1 / -0
    Blood pressure in the pulmonary artery is:
    Solution

    Correct Option: C
    Explanation:

    • The blood pressure in the arteries is greater than that in the veins.
    • Artery > Arteriole > Capillary > Venule > Vein (Vena Cava) 
    • The pulmonary artery is a short and stout (wide) structure that branches into two parts.
    • On the other hand, the pulmonary veins are large blood vessels. 
    • Hence, the pressure of blood is greater in the pulmonary artery as compared to that in the pulmonary vein.
  • Question 2
    1 / -0
    The high-energy bonds of ATP are between:
    Solution
    ATP (adenosine triphosphate) contains three phosphate groups; the bonds between the phosphate molecules are high-energy bonds. These bonds are known as phosphoric anhydride bonds. On the hydrolysis of ATP, these bonds break and release energy.
    Thus, the correct answer is option D.
  • Question 3
    1 / -0
    Which of the following harmful products is not produced in the biochemical reactions of the cells of living organisms?
    Solution
    Lymph is the tissue fluid that circulates in lymphatic vessels. It is similar to blood but without red blood cells. It is not a metabolic harmful product.
    While ammonia, urea and uric acid are waste products that are produced due to the degradation of nitrogenous products. 
    Thus, the correct answer is option D. 
  • Question 4
    1 / -0
    Which of the following medicines is used for indigestion?
    Solution
    • There is acid production in the stomach. Excess acid production may result in problems like indigestion of food which may result in vomiting. 
    • Antacid acts by neutralizing the acid in the stomach. The antacid increases the pH of the stomach. 
    • This helps the process of digestion to occur in normal conditions and treat problems like heartburn and flatulence. 
    • Thus, the correct answer is option B. 
  • Question 5
    1 / -0
    A plant that prepares its own food is called?
    Solution
    • Autotrophs are organisms, that can prepare their own food through the process of photosynthesis such as plants.
    • Heterotrophs are organisms, that cannot prepare their own food and dependent on other organisms for their nutrition such as humans.
    • When an organism is nutritionally dependent on another organism, it is called parasitism. 
    • Saprophytes are organisms, that feed on dead organic matter.
    • Thus, option A is correct.
  • Question 6
    1 / -0
    Haemodialysis means
    Solution
    The correct option is A.
    Haemodialysis is a technique to remove the nitrogenous wastes from the blood. Blood is pumped out of the body to the machine where it is passed through a series of tiny tubes, in an 'artificial kidney' or 'dialyser'.
  • Question 7
    1 / -0
    Which of the following is an incorrect statement?
    Solution
    Molecules move across the cells by active and passive transportation. Osmosis and diffusion are most important transport phenomenon besides the carrier proteins and ion channels that aid for the same purpose. Each organism is made up of single or numbers of cells which perform life process for their survival for which they need energy in the form of ATP. Multicellular organism develops from a single cell (zygote) which divides to form a different cell for their growth, they have a different type of cells for a different function like repair, circulation, respiration etc.

    So, the correct answer is option C.
  • Question 8
    1 / -0
    To remove chlorophyll, the leaf should be boiled in _______.
    Solution
    Chlorophyll is the green pigment found in the leaves. It helps in the process of photosynthesis for preparing starch. For removing this pigment from the leaves, alcohol (ethanol) is used. 
    The process is as follows:
    1. Heat a leaf in boiling water for 30 seconds. This will kill the leaf and stop any chemical reaction.
    2. Now add the blanched leaf to the boiling ethanol in a water bath for a few minutes. 
    3. The boiling ethanol dissolves the chlorophyll and removes the green colour from the leaf. 
    4. The leaf turns white, and hence, the change in colour can be observed now.
    So, the correct answer is option B.
  • Question 9
    1 / -0
    Man is .......... in nutrition.
    Solution
    A man, like all other members of kingdom Animalia, is heterotrophic and is dependent either directly or indirectly on plants for nutrition. Heterotrophic organisms cannot produce their own food and are dependent on autotrophs such as green plants for their nutritional requirements. 
    So, the correct answer is option C - 'Heterotrophic'.
  • Question 10
    1 / -0
    Which of the following is a correct statement about veins?
    Solution
    Veins have valves to prevent the backflow of blood and carry deoxygenated blood from tissues and organs towards the heart. However, the exception is pulmonary vein which carries oxygenated blood from lungs to the heart. Several veins combine together to form vena cava.
    So, the correct answer is option B.
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